Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e43523d2d6b045a…

MALICIOUS

PDF

50.1 KB Created: 2021-06-10 13:04:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9430062e0a1e45d2efe561f2f8d52118 SHA-1: 082841de6579a9fb58b9086a94561779021c1d28 SHA-256: 8e43523d2d6b045a60068feabaaab9b9a03c8ca93e847bb4db95a82b265237e3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/how-to-get-unlimited-robux-hack-game-hack PDF link annotation
    • http://legs11.co.za/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://legs11.co.za/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/simplysarc_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/admin-hack-roblox-free_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F81 26716 bytes
SHA-256: 5568963769a61af1ff354bea1191e5a60ebeaa2c73636e9cc2c35e7d73cb14e1
font_01_sfnt_off00008cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC5 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off00009e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E36 19328 bytes
SHA-256: f2ac51ac475845e3b4ee98aea8d745921cb7d5c804c3c0ed5e6a848f52f8f88a

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